attributeName - name of attribute whose load state is
to be determined

Returns:

false if entity's state has not been loaded or if
the attribute state has not been loaded, else true

isLoaded

boolean isLoaded(java.lang.Object entity)

Determine the load state of an entity belonging to the
persistence unit. This method can be used to determine the
load state of an entity passed as a reference. An entity is
considered loaded if all attributes for which
FetchType.EAGER has been specified have been
loaded.

The isLoaded(Object, String) method
should be used to determine the load state of an attribute.
Not doing so might lead to unintended loading of state.